Gas stove or oven



July 9, 1929. J. P. wlAT-r GAS STOVE OR OVEN Filed June l. 1926 all)Patented July 9, 1929.

UTED STATES PATENT lilFlC..

JOSEPH PATEK WIATT, 0.15' SYDNEY, NEW SOUTH VALES,

1K. 1. B. FOU'NDRY LIMITED, OF SYDNEY, SUTH VJLLES, .lltUlTR-AILUEL,.llt

CORPORATION 0F NEW SOUTH WALES.

GAS STOVE OR OVEN.

Application filed June 1, 1926, Serial No.

This invention relates to stoves or ovens, heated by a coinlaistiblegas. The ohjeet of the invention has been 'to overcome certaindisadvznitages existing,` in sueh ovens as new constructed; nfioreespecially in conserving the heat within the oven7 and, ininii'nizingthe possibility oi the gas hln'ners heini;l extinsl pjuished throughhack draught 'from the tlue pipe and consequent danger of explosion olthe escaping gas.

lf he improvements comprise a passage iin the oven d istinct trein theoven proper. Conneeted to the passage is a waste gas outlet pipe outside`the oven which leads to an upwardly extending l'lue 'toriniug togethera downward and upward hond. At or adjacent to the connai-.tion oit the'l'lue with the outlet pipe at the inulerside of the hond, is an. airinlet, whieh .may have a delleeting plate iin order to direct tl a airup the flue.

lVhen the heating gases rise in the oven they pass through the passagetowards the waste gas outlet. A comparatively slew inoveinent of thesegases talies place, for the reasons that the gases in the passage being`het tend to oller resistance to the escape el the heated gases withinthe oren and. the up draught in the flue pipe is partly air drawnthrough the inlet outside the oven, the eilieet living that the heatedgases draw .in a niiniiunan et cold air through the usual air inletholes or openings at the bottoni oit the oven7 resultingl in the heated`gases remaining lor a longer Vperiod therein.

ln order that my invention may loe more clearly understood, I will nowrefer to the drawings herewith :in which practical einhodinientsthereo't are illustrated.

Figure l. is a sectional elevation of the 'pre- 'tori-ed torni et .stoveconstructed in aeeordance with the invention. the arrows showing thedirection olf llow el: the gas and air, while lligure E29 is a plan viewon line 9.-2, Fig.;- ure l.

llinure 3, is a part perspective view illus- 'tr-ating the air inletinto the flue pipe.

Figure l, in a sectional elevation showing an ordinary oven to which the'invention is applied. i

Relier-ring to Figures l, 2, and 3, l0 is a stove with door ll, thesides l2, loael 18, and top let being,` preferably double jaeketed andpacked with heat resisting material suoli as mineral. wool, 0r asbestosor the like. 15 is the 113,045, and in Australia Mlareh 9, 1926'.

usual. hot plate. 16 is a passage which extends 'trein fuljacent thebottoni where it iS closed to near the top et the stove', the upper endthere-ot being` open to the stove. A. waste pas outlet 1T is connectedto the stove l() heingg open to the passagtge or spaee 'formed hy apartition i8, and to an uiLiward llue 1W. deller-tingl plate or lmlllell) is provided :in the outlet i7 so positioned that it will facilitateair heine' drawn in `through the epeninf 2l and assist in preverding`excess oit air flowing` past the burners il() and through the stove l0.

ln operation there is a comparatively slow n'iovfnnent oli the healedgases in tl i stove owing;1 to the lfaet that the hot gases in thepassaoje jll tend to resist the escape ol heated eases liroui the ovenand that the unalraught in the 'l'lue pipe li partly draws in airthrough the inlet or (Woningl 9i, eonsequeutly the heat-ed gases draw ina inin inunn ol" cold air through the air inlet holes or (apuniulfs atthe hottoin et the oven, and, as the stove is preferably jaeheted orniade heat resistiiig, a large saving in gas eonsuinption is olitained.

ylhe huruers 22d-2O may he turned ol'l'l alter the stove has reaehed apredetermined teinperature and the heat retained in the stove for aconsiderable time.

ln lligure fl, lll) is au (iu'dinary aus oven having an inner erownplate 3l and an outer crown plate l2 leaving); a space or passage lzlinto 'which the waste heated groses pass tln'ouirh the usual openino'sas ill. lil1 roni the tu' 7 lv) A) end ol said, passage oo is au outletl5 having a downward and upward hend outside the oven' and 'to theupward part is connected the line 3G. ln the uinlerside oit the hend anair inlet 87 which may have a dellector plate or baille 38.

l. claim:

A gas stove coniprisinje,r a structure includingl an oven chaniherhavinpr air inlet openings in the bottoni, a ons learner in saidehaniher7 an outlet duct leading' troni the upper portion oil saidchauiher and au upwardly directed 'llue into which said outlet ductdischarges, said llue havingl an elliow provided with an air inletopening; and also having,` a .fixed hallle at the side olf said airinlet opening nearest the gas intatte end (l said flue, and extending`nearly across said ne.

